FDM vs SLS 3D Printing
FDM extrudes filament with support structures; SLS sinters nylon powder with a laser and needs no supports. SLS produces stronger, more isotropic production-grade parts; FDM is cheaper for one-offs.
| FDM | SLS | |
|---|---|---|
| Strength | Good, anisotropic (weaker across layers) | Excellent, near-isotropic nylon parts |
| Supports | Needs supports for overhangs | Self-supporting — complex geometries free |
| Surface | Layer lines; smoothing optional | Uniform matte, slightly grainy |
| Batch production | One part at a time per machine | Nest many parts in one powder bed |
| Cost | Low for single parts | Higher setup; efficient at volume |
| Best for | Prototypes, fixtures, large single parts | Functional nylon parts, small-batch production |
Choose FDM
Choose FDM for low-cost single parts, large models, and quick iterations.
Find FDM providers →Choose SLS
Choose SLS for strong, complex or batch nylon parts that need no supports.
Find SLS providers →